Date: Sun, 15 Feb 2026 22:59:31 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 293198] zfs deadlock while copying many files, vfs_deleteextattr_dir-related? Message-ID: <bug-293198-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=293198 Bug ID: 293198 Summary: zfs deadlock while copying many files, vfs_deleteextattr_dir-related? Product: Base System Version: 15.0-RELEASE Hardware: amd64 OS: Any Status: New Severity: Affects Many People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: pen@lysator.liu.se Created attachment 268084 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=268084&action=edit Output from procstat -kk -a While copying many zfs (30000) filesystems (using a loop of zfs create ; tar cpf - | (cd xxx ; tar xpf -) the bsdtar writing the files (and eventually the whole system) deadlocks at after some 479 filesystems have been copied: # fgrep bsdtar /tmp/procstat-kka-2.out 48759 103729 bsdtar - mi_switch+0xbc sleepq_catch_signals+0x27d sleepq_wait_sig+0x9 _sleep+0x197 uipc_sosend_stream_or_seqpacket+0x475 sousrsend+0x5f dofilewrite+0x81 sys_write+0x127 amd64_syscall+0x126 fast_syscall_common+0xf8 48760 105220 bsdtar - mi_switch+0xbc _sleep+0x19e rms_rlock_fallback+0x90 zfs_lookup+0x74 zfs_deleteextattr_dir+0x38 zfs_setextattr+0x7dc VOP_SETEXTATTR_APV+0x24 extattr_set_vp+0x11d kern_extattr_set_path+0x14e sys_extattr_set_link+0x6b amd64_syscall+0x126 fast_syscall_common+0xf8 My reading of the deadlock is that it is related to some extattrs. ps auxww|grep bsdtar indicates that it was copying some stuff in a Documents/My Videos directory that looks like this in the source: # ls -laR My\ Videos total 28 drwxr-xr-x 2 agnra495 student-liu.se 3 Apr 9 2025 $RECYCLE.BIN drwxr-xr-x 3 agnra495 student-liu.se 4 Apr 15 2025 . drwxr-xr-x 6 agnra495 student-liu.se 7 Apr 15 2025 .. -rw-r--r-- 1 agnra495 student-liu.se 504 Apr 15 2025 desktop.ini My Videos/$RECYCLE.BIN: total 11 drwxr-xr-x 2 agnra495 student-liu.se 3 Apr 9 2025 . drwxr-xr-x 3 agnra495 student-liu.se 4 Apr 15 2025 .. -rw-r--r-- 1 agnra495 student-liu.se 129 Apr 9 2025 desktop.ini There are some extattrs set on the files but nothing strange: # find . -print | xargs lsextattr user . DOSATTRIB ./desktop.ini DOSATTRIB ./$RECYCLE.BIN DOSATTRIB ./$RECYCLE.BIN/desktop.ini DOSATTRIB # find . -print | xargs lsextattr system . ./desktop.ini ./$RECYCLE.BIN ./$RECYCLE.BIN/desktop.ini Attaching the full "procstat -kk -a" output. The copying is being done inside a Zpool. -- You are receiving this mail because: You are the assignee for the bug.home | help
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